Daylight saving: local time and fixed SGT and GMT
The converter starts with Singapore to London, using local clock rules. For the standard-time offsets all year, use the fixed SGT and GMT button.
These examples use noon on the dates shown. A converted date can be the previous or following day.
| Starting date and time | Using local city rules | Using fixed SGT and GMT |
|---|---|---|
| 2026-01-15 12:00 | 2026-01-15 04:00 (UTC+00:00) | 2026-01-15 04:00 |
| 2026-07-15 12:00 | 2026-07-15 05:00 (UTC+01:00) | 2026-07-15 04:00 |
12:00 PM Wednesday 15 Jul in Singapore is 5:00 AM Wednesday 15 Jul in London (BST, 7 h behind).
Why daylight saving conversions need a date explains skipped and repeated clock readings. The rules here come from the browser’s time zone data and can lag a government change.